code: def test_relative_path(self):
      output = create_file_basename(
          "", "test.txt", "output", "", makedirs=False
      )
      expected = os.path.join("output", "test", "test")
      self.assertEqual(output, expected)
  
file_path: MONAI/tests/test_file_basename.py
imports: from __future__ import annotations
  import os
  import tempfile
  import unittest
  from pathlib import Path
  from monai.data.utils import create_file_basename
label_desc: Use image node_id 2 for calling the TestFilename obj's underlying member method code with example usage: obj.test_relative_path() without return types